High-performance premixed concrete and preparation method thereof
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A ready-mixed concrete, high-performance technology, applied in the field of concrete, can solve the problems of cracks in building components, poor durability, and inability to use for a long time, and achieve the effects of uniform distribution of hydration products, improved durability, and improved impermeability
Active Publication Date: 2021-12-28
深圳市汇鑫混凝土有限公司
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If the durability of ready-mixed concrete is poor, the building components are pr
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Embodiment 1-5
[0040] A high-performance ready-mixed concrete prepared from concrete mixture, which includes the following raw materials: Portland cement, fine aggregate, coarse aggregate, mineral admixture, water, polycarboxylate high-efficiency reducer Aqueous agent, triterpene saponin, fatty alcohol polyoxyethylene ether sodium sulfate.
[0041] Among them, the fine aggregate is medium sand.
[0042] Coarse aggregate is one or more mixtures of natural stone and crushed gravel with an average particle size of 12mm.
[0043] The mineral admixture is fly ash and slag powder, and the weight ratio of fly ash and slag powder is 1: (0.9-1.1).
[0044] Refer to Table 2 for the specific selection and dosage of the above various raw materials.
[0045] The preparation method of high-performance ready-mixed concrete comprises the following steps:
[0046] Step 1): Heating triterpene saponins, fatty alcohol polyoxyethylene ether sodium sulfate, and water at a specified temperature, and stirring at...
Embodiment 6
[0054] A high-performance ready-mixed concrete, the difference from Example 5 is that the polycarboxylate superplasticizer is CC-AI polycarboxylate superplasticizer.
Embodiment 7
[0056] A kind of high-performance ready-mixed concrete, and the difference with embodiment 5 is that, in step 3), also put into with sulfamate superplasticizer, sulfamate superplasticizer and polycarboxylic acid superplasticizer The weight ratio of the agent is 0.5:1, that is, the input amount of the sulfamate superplasticizer is 0.95kg.
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Abstract
The invention relates to the field of concrete, in particular to high-performance premixed concrete and a preparation method thereof. The high-performance premixed concrete is prepared from a concrete mixture. The concrete mixture comprises the following raw materials: Portland cement, fine aggregate, coarse aggregate, a mineral admixture, water, a polycarboxylate superplasticizer, triterpenoid saponin and fatty alcohol polyoxyethylene ether sodium sulfate. The preparation method of the high-performance premixed concrete comprises the following steps: step 1) stirring the triterpenoid saponin, the sodium alcohol ether sulphate and the water under a heating condition to obtain an additive solution for later use; 2) mixing the Portland cement, the mineral admixture and the fine aggregate to obtain a primary mixture; 3) mixing the additive solution, the polycarboxylate superplasticizer and the primary mixture to obtain a medium mixture; and 4) mixing the medium mixture with the coarse aggregate to obtain a finished product. The method has the advantage that the durability of the premixed concrete is improved.
Description
technical field [0001] This application relates to the field of concrete, and more particularly, it relates to high performance ready-mixed concrete and methods for its preparation. Background technique [0002] Ready-mixed concrete refers to cement, aggregates, water, admixtures, mineral admixtures and other components that are mixed according to needs in a certain proportion, and is sold at the mixing station after being measured and mixed, and is sold by transport vehicles. Concrete mix transported to the place of use within the specified time. [0003] The durability of concrete refers to the ability of concrete to resist various damage factors under actual use conditions and maintain the integrity of strength and appearance for a long time. There are many factors affecting the durability of structures. The quality of concrete and its protective layer are internal factors; the environment and load are external factors, and different reasons will cause different conseque...
Claims
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